I could not reproduce the issue..
could you submit a self-contained, obfuscated test case (DRL + classes)?
I suspect you are leaving out some detail which is the real cause of the error
Thanks
Davide

p.s. I used this mock class:

package vrpn;
public class TrackerRemote {
    public TrackerUpdate getUpdate() {
        return new TrackerUpdate();
    }
    public class TrackerUpdate {
    }
}

and your rule, removing the "message" from the RHS



On 07/30/2013 01:51 AM, De Rooms Brecht wrote:
Op 24/07/2013 14:24, Davide Sottara schreef:
Two clarifications first:

1) Which version are you using?
I am using version 5.5
2) Is TrackerUpdate a static class inside TrackerRemote?
In case, could you post the exact "import" statements you are using?

the TrackerUpdate is not static, but it's a class defined within the TrackerUpdate class.
public class TrackerRemote
....
 public class TrackerUpdate {
        public java.util.Date msg_time;
        public int sensor;
        public double[] pos;
        public double[] quat;

        public TrackerUpdate() { /* compiled code */ }
    }

The full imports and rule is:
package derooms.be.testRule
import derooms.be.server.predefinedtypes.Event;
import derooms.be.test.Message;
import vrpn.TrackerRemote;

rule "TrackerRemote.TrackerUpdate"
    when
        message:TrackerRemote.TrackerUpdate()
    then
        System.out.println("Tracker: " + message);
end

Sorry that I didn't sent it earlier, I actually sent this e-mail already but it didn't came through.

B

Thanks
Davide

On 07/24/2013 02:14 PM, De Rooms Brecht wrote:
Dear rules users,

I am currently writing my own Drools-server since I wanted more control than the drools-execution server (and it never worked very well here) where I can send rules/facts over JMS/AQMP/STOMP. Rules which are sent are saved on the server-side in DRL files that are monitored. That way, I can debug easily by changing the sent files. However, when I sent the following code, the agent does not provide me with an error message at all and hangs:

rule "TrackerRemote.TrackerUpdate"
    when
        message:TrackerRemote.TrackerUpdate()
    then
        System.out.println("Tracker: " + message);
end

at first I thought it was because TrackerRemote.TrackerUpdate is not in that package anymore and thus unknown so I tried to send the rule listed below which gives me the nice and expected error:
    Unable to resolve ObjectType 'NotExistingType' : [Rule name='Foo']

rule "Foo"
    when
        NotExistingType( bloe == "test")
    then
        System.out.println("this should not work");
end

when I compile the rule myself with a KnowledgeBuilder:

KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
InputStream is = new ByteArrayInputStream(drlstring.getBytes());
kbuilder.add( ResourceFactory.newInputStreamResource(is),ResourceType.DRL );

I receive the error:
org.drools.rule.Rule cannot be cast to org.drools.rule.Query
which I think doesn't tell me anything about the mistake I made in my rule, is this a Drools bug and should I post this somewhere?

Kind Regards,
De Rooms Brecht


Full Stack:
java.lang.ClassCastException: org.drools.rule.Rule cannot be cast to org.drools.rule.Query
    at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:175)
    at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:118)
    at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:67)
    at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:84)
    at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2706)
    at org.drools.compiler.PackageBuilder.compileRules(PackageBuilder.java:930)
    at org.drools.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:839)
    at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:831)
    at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:467)
    at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:673)
    at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:45)
    at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:34)
    at derooms.be.server.listeners.RulesListener.processMessage(RulesListener.java:33)
    at derooms.be.server.listeners.AbstractListener.onMessage(AbstractListener.java:35)
    at org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1321)
    at org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131)
    at org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202)
    at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129)
    at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)


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